. >> reporter: it is approved for use in many parts of the world including canada and mexico. so, what will it take to get the next obesity drug approved? on biocentury this week, leading weight loss doctors discuss obesity fighting obstacles. that is 8:30 this sunday morning on wusa. >>> if you are looking to buy a flat screen tv, the large supply is causing prices to plummet in time for the holiday shopping season. one market research company says prices could drop 12% over the last three months of the year. >>> halloween is not as scary for retamers this year. a survey by the national retail federation says each person is expected to spend $86 on costumes, candy and decorations. and that's $10 more than last year. four out of ten people are planning to dress up for the holiday with lady gaga and twilight characters expected to be the most popular costumes and many kids will dress up as their favorite super heros. i will have to pass on lady gaga. >>> digital books are coming to a library near you and you can sample the collection inside of a digital bookmobile on thenal nat